The operation of arithmetic addition (+) is malfunctioning within the ng-bind functionality

There is a specific object with the following data:

objData.pendingCount = '2', objData.refundCount = '1', objData.saleCount = 43;

I have successfully implemented the functionality to calculate and display the pending count percentage using AngularJS:

<td ng-bind="(objData.pendingCount / objData.saleCount * 100).toFixed(2)"></td>

However, I encountered an issue when trying to calculate the combined percentage of pending and refund counts:

<td ng-bind="(objData.pendingCount + objData.refundCount) / objData.saleCount * 100).toFixed(2)"></td>

The addition operation (+) in the above code is not performing arithmetic calculation as expected, instead it is concatenating the values. How can I resolve this issue?

javascriptangularjsng-bind

Answer №1

It seems like these values are being retrieved from a text box, probably through ng-model. To solve this issue easily, you can simply set the type='number' attribute on the input element and let Angular handle the rest!

<input ng-model="objData.pendingCount" type="number" />
...

Another option is to add a '+' sign before the variables to force them to be treated as numbers, like this:

<span ng-bind="((+objData.pendingCount + +objData.refundCount)/ objData.saleCount * 100).toFixed(2)"></span>

The reasoning behind not using Number(...) in an Angular expression

Directly using Number to convert a string to a number won't work because (as stated in https://docs.angularjs.org/guide/expression)

Context: JavaScript expressions are evaluated against the global window. In Angular, expressions are evaluated against a scope object.

If you really need to use Number, you can assign it to a scope variable like this:

$scope.Number = $window.Number;

This should be done in your controller before using it in the expression. The same applies to other global window properties.

Answer №2

fixes your code snippet:

<td ng-bind="(objData.pendingCount + objData.refundCount) / (objData.saleCount * 100).toFixed(2)"></td>

has a missing opening parenthesis

Answer №3

I managed to resolve the issue by utilizing the following code snippet:

<td ng-bind="(sum(objData.pendingCount,objData.refundCount)/objData.saleCount*100).toFixed(2)"></td>

Furthermore, in the controller section, I added the following function:

$scope.sum = function (a, b) {
   return parseInt(a) + parseInt(b);
}

The solution is now functioning perfectly.

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